The S100A8/A9 complex reduces CTLA4 expression by immature myeloid cells: Implications for pancreatic cancer-driven
Daniela Basso1, Paola Fogar, Mario Plebani
1Department of Laboratory Medicine; University-Hospital of Padova; Padova, Italy.
Oncoimmunology
|July 30, 2013
Abstract:
An expansion of different myeloid derived suppressive cell (MDSC) subsets can be detected in the blood and secondary lymphoid organs of early and advanced pancreatic ductal adenocarcinoma (PDAC) patients. Double negative (CD14-HLA-DR-) MDSCs are frequently induced by PDACs. In addition, by releasing S100A8 and S100A9, advanced PDAC lesions cause an expansion of highly immunosuppressive CD33+CD14+HLA-DR- monocytic MDSCs expressing low levels of cytotoxic T lymphocyte antigen 4 (CTLA4) on the cell surface.
